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Growth and development of Chrysaora quinquecirrha reared under different diet compositions

Year: 2015
Type: dissertation
Abstract: As a contribution to further understanding the growth and rearing in aquaculture of the jellyfish Chrysaora quinquecirrha, laboratorial experiments were conducted in order to evaluate key differences in growth in regards to different food items given to ephyras, identifying the best diet for this species and development stage, and thus contributing to the optimization of its aquaculture. 9 tanks were set up where medusa were fed 3 different diets in 3 replicate tanks each – 3 replicate tanks were fed enriched Artemia nauplii, 3 were fed Acartia grani copepods enriched with Rhodomonas sp. and the last 3 were fed minced Aurelia aurita. The main aim was to identify the diet that translated into maximum ephyra growth of Chrysaora quinquecirrha for a 31 day period (with 10 ephyras per tank with identical size and age). Ephyra pulses were monitored daily and there were no significant differences between ephyra grown with different diets, revealing that all prey elicited a similar feeding response. However, growth rates were significantly different for ephyra grown with different diets. The diet that resulted in highest growth rates of the ephyras consisted in minced Aurelia aurita (2.6mm ±SD over the course of 31 days), followed by the diet consisting of copepods (1.8mm ±SD over the course of 31 days) and finally the diet based on Artemia nauplii (1.08mm ±SD over the course of 31 days). This study recommends that the dietary supplementation with copepods or minced Aurelia aurita is an important enhancement of the management of Chrysaora quinquecirrha ephyra culture, and that growth rates can be elevated from 83.1% to 128.6% (Acartia grani) and 185.7% (Aurelia aurita) when compared to the traditional diet.
Language: English
Open Access status: green
OpenAlex ID: W2301925995
Cites: 22
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Related to: 10